Add delete model endpoint (DELETE /api/delete)

Implement the Ollama DELETE /api/delete endpoint for removing models
from the server.

- Add DeleteRequest type with model field in src/types/delete.rs
- Add OllamaClient::delete() async method in src/lib.rs
- Register delete module in src/types/mod.rs
- Add usage example in examples/delete.rs

examples/delete.rs

@@ -0,0 +1,16 @@
+use std::{env, error::Error};
+
+use ollama_rs::OllamaClient;
+use ollama_rs::types::delete::DeleteRequest;
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn Error>> {
+    tracing_subscriber::fmt().init();
+    let _ = dotenvy::dotenv();
+    let server_address = env::var("OLLAMA_SERVER")?;
+    let model = env::args().nth(1).expect("usage: delete <model>");
+    let ollama_client = OllamaClient::new(server_address);
+    ollama_client.delete(DeleteRequest::new(&model)).await?;
+    println!("Model '{}' deleted successfully", model);
+    Ok(())
+}

src/lib.rs

@@ -93,6 +93,7 @@ use crate::{
     error::{OllamaError, OllamaResult},
     types::{
         chat::{ChatRequest, ChatResponse},
+        delete::DeleteRequest,
         generate::{GenerateRequest, GenerateResponse},
         ps::PsResponse,
         pull::{PullRequest, PullResponse},
@@ -247,6 +248,40 @@ impl OllamaClient {
             .await?)
     }
 
+    /// Deletes a model from the Ollama server.
+    ///
+    /// Calls `DELETE /api/delete`.
+    ///
+    /// # Errors
+    ///
+    /// Returns [`OllamaError::NetworkError`] if the server is unreachable, the model
+    /// does not exist, or the server returns a non-success status code.
+    ///
+    /// # Examples
+    ///
+    /// ```no_run
+    /// # use ollama_rs::OllamaClient;
+    /// # use ollama_rs::types::delete::DeleteRequest;
+    /// # async fn run() -> ollama_rs::error::OllamaResult<()> {
+    /// let client = OllamaClient::default();
+    /// let request = DeleteRequest::new("gemma3");
+    /// client.delete(request).await?;
+    /// println!("Model deleted successfully");
+    /// # Ok(())
+    /// # }
+    /// ```
+    pub async fn delete(&self, request: DeleteRequest) -> OllamaResult<()> {
+        let request_address = format!("{}/api/delete", self.server_address);
+        info!("Delete model: {}", request.model);
+        self.client
+            .delete(request_address)
+            .json(&request)
+            .send()
+            .await?
+            .error_for_status()?;
+        Ok(())
+    }
+
     fn stream_response<R: Serialize, T: DeserializeOwned>(
         &self,
         endpoint: String,

src/types/delete.rs

@@ -0,0 +1,77 @@
+//! Types for the model delete endpoint (`DELETE /api/delete`).
+//!
+//! Use [`DeleteRequest::new()`] to construct a request and pass it to
+//! [`OllamaClient::delete()`](crate::OllamaClient::delete).
+//!
+//! # Examples
+//!
+//! ```no_run
+//! # use ollama_rs::OllamaClient;
+//! # use ollama_rs::types::delete::DeleteRequest;
+//! # async fn run() -> ollama_rs::error::OllamaResult<()> {
+//! let client = OllamaClient::default();
+//! let request = DeleteRequest::new("gemma3");
+//! client.delete(request).await?;
+//! println!("Model deleted successfully");
+//! # Ok(())
+//! # }
+//! ```
+
+use serde::{Deserialize, Serialize};
+
+/// A request to delete a model from the Ollama server (`DELETE /api/delete`).
+///
+/// # Examples
+///
+/// ```
+/// use ollama_rs::types::delete::DeleteRequest;
+///
+/// let request = DeleteRequest::new("gemma3");
+/// assert_eq!(request.model, "gemma3");
+/// ```
+#[derive(Debug, Serialize, Deserialize)]
+pub struct DeleteRequest {
+    /// The name of the model to delete (e.g., `"gemma3"`, `"llama3:latest"`).
+    pub model: String,
+}
+
+impl DeleteRequest {
+    /// Creates a new [`DeleteRequest`] for the given model name.
+    pub fn new<M: Into<String>>(model: M) -> Self {
+        Self {
+            model: model.into(),
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use serde_json::json;
+
+    #[test]
+    fn new_creates_request() {
+        let request = DeleteRequest::new("gemma3");
+        assert_eq!(request.model, "gemma3");
+    }
+
+    #[test]
+    fn new_accepts_string() {
+        let request = DeleteRequest::new(String::from("llama3:latest"));
+        assert_eq!(request.model, "llama3:latest");
+    }
+
+    #[test]
+    fn request_serializes_correctly() {
+        let request = DeleteRequest::new("gemma3");
+        let json = serde_json::to_value(&request).unwrap();
+        assert_eq!(json, json!({"model": "gemma3"}));
+    }
+
+    #[test]
+    fn request_deserializes_correctly() {
+        let json = json!({"model": "gemma3"});
+        let request: DeleteRequest = serde_json::from_value(json).unwrap();
+        assert_eq!(request.model, "gemma3");
+    }
+}

src/types/mod.rs

@@ -2,14 +2,15 @@
 //!
 //! Each submodule corresponds to an API endpoint:
 //!
-//! | Module       | Endpoint          | Description                              |
-//! |--------------|-------------------|------------------------------------------|
-//! | [`chat`]     | `POST /api/chat`     | Multi-turn chat conversations         |
-//! | [`generate`] | `POST /api/generate` | Single-prompt text generation         |
-//! | [`pull`]     | `POST /api/pull`     | Download models from the registry     |
-//! | [`tags`]     | `GET /api/tags`      | List available models                 |
-//! | [`ps`]       | `GET /api/ps`        | List currently loaded/running models  |
-//! | [`version`]  | `GET /api/version`   | Query the server version              |
+//! | Module       | Endpoint              | Description                              |
+//! |--------------|-----------------------|------------------------------------------|
+//! | [`chat`]     | `POST /api/chat`      | Multi-turn chat conversations            |
+//! | [`delete`]   | `DELETE /api/delete`   | Delete a model from the server           |
+//! | [`generate`] | `POST /api/generate`  | Single-prompt text generation            |
+//! | [`pull`]     | `POST /api/pull`      | Download models from the registry        |
+//! | [`tags`]     | `GET /api/tags`       | List available models                    |
+//! | [`ps`]       | `GET /api/ps`         | List currently loaded/running models     |
+//! | [`version`]  | `GET /api/version`    | Query the server version                 |
 //!
 //! The [`common`] module contains types shared across multiple endpoints, such as
 //! [`Options`](common::Options) for generation parameters, [`Think`](common::Think)
@@ -17,6 +18,7 @@
 
 pub mod chat;
 pub mod common;
+pub mod delete;
 pub mod generate;
 pub mod ps;
 pub mod pull;